RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Mole

Largest measured 3-spined stickleback: 4.3 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Mole was 4.3 cm, recorded at Downstream Downside Mill on 24 June 2025.

Across 11 measured 3-spined stickleback, the median measured length was 3.2 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Mole.

See 3-spined stickleback records across England →

Most recent observation17 July 2025Norbury Park, Near Mickleham · 1 fish
Largest measured 3-spined stickleback
4.3 cm
Median length
3.2 cm
Fish measured
11
Survey locations
17

Individual EA measurements

Largest measured 3-spined stickleback

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
4.3 cm24 Jun 2025Downstream Downside Mill177059
3.8 cm24 Jun 2025Downstream Downside Mill177059
3.8 cm24 Jun 2025Downstream Downside Mill177059
3.6 cm14 Oct 2015Downstream Gatwick147327
3.4 cm14 Oct 2015Downstream Gatwick147327
3.2 cm14 Oct 2015Downstream Gatwick147327
3 cm20 Oct 2015Box Hill147235
2.8 cm30 Sept 2015Meath Green Farm, Horley146801
2.5 cm17 Jul 2025Norbury Park, Near Mickleham178708
2.4 cm24 Jun 2025Downstream Downside Mill177059

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where 3-spined stickleback were found

Each point marks a survey location with at least one 3-spined stickleback record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding 3-spined stickleback
Norbury Park, Near Mickleham16 Feb 199317 Jul 20254
Downstream Downside Mill24 Jun 202524 Jun 20251
Box Hill2 Nov 200620 Oct 20153
Downstream Gatwick8 Sept 199214 Oct 20154
Meath Green Farm, Horley1 Oct 199230 Sept 20155
Downstream Painshill23 Oct 200723 Oct 20071
Below Downside Bridge, Cobham.14 Nov 198519 Oct 20054
Flanchford Farm12 Oct 200412 Oct 20041
Randalls Road, Leatherhead7 Nov 20037 Nov 20031
Povey Cross Enhancement Scheme20 Aug 200220 Aug 20021
Below Granthams Bridge, Lambs Green27 Jul 199327 Jul 19931
South Weylands Farm7 May 19937 May 19931
Upstream Brockham Bridge4 Feb 19934 Feb 19931
Horley Swimming Baths17 Jul 199217 Jul 19921
Upstream Sidlow Bridge18 May 198918 May 19891
Upstream Horley STW16 May 198916 May 19891
Downstream Brockham Bridge8 Oct 19858 Oct 19851

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1985–2025

Survey records by year

Each bar shows how many survey visits recorded 3-spined stickleback that year.

Fish measured by surveyors

Measured length distribution

See how the 11 measured fish were spread across different length ranges.

Smallest
2.4 cm
Lower quarter
2.7 cm
Median
3.2 cm
Upper quarter
3.7 cm
Largest
4.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Mole

Compare other species with enough survey and measurement data for a detailed page.

Roach Dace Chub Gudgeon Minnow Stone loach

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →